import axios from "axios";
import {
  ElNotification,
  ElMessageBox,
  ElMessage,
  ElLoading,
} from "element-plus";
import { getToken } from "@/utils/auth";
import errorCode from "@/utils/errorCode";
import {
  tansParams,
  blobValidate,
} from "@/utils/ruoyi";
import cache from "@/plugins/cache";
import { saveAs } from "file-saver";
import useUserStore from "@/store/modules/user";

let downloadLoadingInstance;
// 是否显示重新登录
export let isRelogin = { show: false };

axios.defaults.headers["Content-Type"] =
  "application/json;charset=utf-8";
// 创建axios实例
const service = axios.create({
  // axios中请求配置有baseURL选项，表示请求URL公共部分
  baseURL: import.meta.env
    .VITE_APP_BASE_API,
  // 超时
  timeout: 10000,
});

// request拦截器
service.interceptors.request.use(
  (config) => {
    // 是否需要设置 token
    const isToken =
      (config.headers || {}).isToken ===
      false;
    // 是否需要防止数据重复提交
    const isRepeatSubmit =
      (config.headers || {})
        .repeatSubmit === false;
    if (getToken() && !isToken) {
      config.headers["Authorization"] =
        "Bearer " + getToken(); // 让每个请求携带自定义token 请根据实际情况自行修改
    }
    // get请求映射params参数
    if (
      config.method === "get" &&
      config.params
    ) {
      let url =
        config.url +
        "?" +
        tansParams(config.params);
      url = url.slice(0, -1);
      config.params = {};
      config.url = url;
    }
    if (
      !isRepeatSubmit &&
      (config.method === "post" ||
        config.method === "put")
    ) {
      const requestObj = {
        url: config.url,
        data:
          typeof config.data ===
          "object"
            ? JSON.stringify(
                config.data
              )
            : config.data,
        time: new Date().getTime(),
      };
      const requestSize = Object.keys(
        JSON.stringify(requestObj)
      ).length; // 请求数据大小
      const limitSize = 5 * 1024 * 1024; // 限制存放数据5M
      if (requestSize >= limitSize) {
        console.warn(
          `[${config.url}]: ` +
            "请求数据大小超出允许的5M限制，无法进行防重复提交验证。"
        );
        return config;
      }
      const sessionObj =
        cache.session.getJSON(
          "sessionObj"
        );
      if (
        sessionObj === undefined ||
        sessionObj === null ||
        sessionObj === ""
      ) {
        cache.session.setJSON(
          "sessionObj",
          requestObj
        );
      } else {
        const s_url = sessionObj.url; // 请求地址
        const s_data = sessionObj.data; // 请求数据
        const s_time = sessionObj.time; // 请求时间
        const interval = 1000; // 间隔时间(ms)，小于此时间视为重复提交
        if (
          s_data === requestObj.data &&
          requestObj.time - s_time <
            interval &&
          s_url === requestObj.url
        ) {
          const message =
            "数据正在处理，请勿重复提交";
          console.warn(
            `[${s_url}]: ` + message
          );
          return Promise.reject(
            new Error(message)
          );
        } else {
          cache.session.setJSON(
            "sessionObj",
            requestObj
          );
        }
      }
    }
    return config;
  },
  (error) => {
    console.log(error);
    Promise.reject(error);
  }
);

// 响应拦截器
service.interceptors.response.use(
  (res) => {
    // 未设置状态码则默认成功状态
    const code = res.data.code || 200;
    // 获取错误信息
    const msg =
      errorCode[code] ||
      res.data.msg ||
      errorCode["default"];
    // 二进制数据则直接返回
    if (
      res.request.responseType ===
        "blob" ||
      res.request.responseType ===
        "arraybuffer"
    ) {
      return res.data;
    }
    if (code === 401) {
      if (!isRelogin.show) {
        isRelogin.show = true;
        ElMessageBox.confirm(
          "登录状态已过期，您可以继续留在该页面，或者重新登录",
          "系统提示",
          {
            confirmButtonText:
              "重新登录",
            cancelButtonText: "取消",
            type: "warning",
          }
        )
          .then(() => {
            isRelogin.show = false;
            useUserStore()
              .logOut()
              .then(() => {
                location.href =
                  "/index";
              });
          })
          .catch(() => {
            isRelogin.show = false;
          });
      }
      return Promise.reject(
        "无效的会话，或者会话已过期，请重新登录。"
      );
    } else if (code === 500) {
      ElMessage({
        message: msg,
        type: "error",
      });
      return Promise.reject(
        new Error(msg)
      );
    } else if (code === 601) {
      ElMessage({
        message: msg,
        type: "warning",
      });
      return Promise.reject(
        new Error(msg)
      );
    } else if (code !== 200) {
      ElNotification.error({
        title: msg,
      });
      return Promise.reject("error");
    } else {
      return Promise.resolve(res.data);
    }
  },
  (error) => {
    console.log("err" + error);
    let { message } = error;
    if (message == "Network Error") {
      message = "后端接口连接异常";
    } else if (
      message.includes("timeout")
    ) {
      message = "系统接口请求超时";
    } else if (
      message.includes(
        "Request failed with status code"
      )
    ) {
      message =
        "系统接口" +
        message.substr(
          message.length - 3
        ) +
        "异常";
    }
    ElMessage({
      message: message,
      type: "error",
      duration: 5 * 1000,
    });
    return Promise.reject(error);
  }
);

// 通用下载方法
export function download(
  url,
  params,
  filename,
  config
) {
  downloadLoadingInstance =
    ElLoading.service({
      text: "正在下载数据，请稍候",
      background: "rgba(0, 0, 0, 0.7)",
    });
  return service
    .post(url, params, {
      transformRequest: [
        (params) => {
          return tansParams(params);
        },
      ],
      headers: {
        "Content-Type":
          "application/x-www-form-urlencoded",
      },
      responseType: "blob",
      ...config,
    })
    .then(async (data) => {
      const isBlob = blobValidate(data);
      if (isBlob) {
        const blob = new Blob([data]);
        saveAs(blob, filename);
      } else {
        const resText =
          await data.text();
        const rspObj =
          JSON.parse(resText);
        const errMsg =
          errorCode[rspObj.code] ||
          rspObj.msg ||
          errorCode["default"];
        ElMessage.error(errMsg);
      }
      downloadLoadingInstance.close();
    })
    .catch((r) => {
      console.error(r);
      ElMessage.error(
        "下载文件出现错误，请联系管理员！"
      );
      downloadLoadingInstance.close();
    });
}

export default service;
